Rotary engine.



No. 805,958. PATENTBD NOV. 28, 1905.

E. H. HOLDEN.

ROTARY ENGINE.

PLI TI r1 1' o. A 1 0A 0N LED MAY 5,195 ZSIHEETFSHBBTL ""II I I I l'' wits two Mm l5 a 'PATENTED NOV. 28, 1905. E. H. HOLDEN.

ROTARY ENGINE.

APPLIUATION FILED MAY 15, 1905.

2 sums-sum 2.

UNITED 'srA TEs PATENT OFFICE.

EUGENE H. HOLDEN, oEKEENE, NEw HAMPsHiRE. .ASSIGNOR OF oNE- HALF To. GEORGE H. GIFFIN, OF KEENE, NEw- HAMPSHIRE.

ROTARY ENGINE.

Specification of Letters Patent.

Patented Nov. 28, 1905.

, To wZZ whom it. may concern.-

Be it known that I, EUGENE H. HOLDEN, a resident of Keene, in the county ofOheshire and State of New Ham shire, have invented certain new and useful improvements in R0- tary Engines; and I do hereby declare the following to be a full, clear, and exact descri tion of the invention, .such as will enab e others skilled in the art to which it pertains .to make and use the same.

This invention relates to rotary engines,

and has for its object to provide a simple, -economically constructed, smoothly runa section on line 3 3 of Fig. 1, the view eingtoward the left of said latter figure. Fig. 4 is a perspective of an abutment; Fig. 5 is a central longitudinal section of a steam-admission valveand casing on a larger scale and the valve turned to open position, and

Fig.6 is a partial central section of the'cylin er.

Numeral 1 denotes a base, 1 pedestals to support shaft-bearings, and 1 pedestals sup-- porting the steam-cylinder 2. This cylinder is provided with extensions 3 to operatively contain steam-abutments 4. These are approximately semicylindrical in form, as shown, and are fixed to shafts 5, havin journal-bearings 6 in the ends of the cylinder extensions. Each of the shafts 5 has at each end an arm or crank 7, operatively connected by a pivoted rod 8 to a crank-arm 9 on, a valve-stem 10, controlling steam admission through pipe 11 and inlet 12 of valve 13, one valve being above and .the other below the level of the abutment-shafts, as represented. The cranks 7 at one end of the engine are situated at right angles to those at the other end to avoid ead-centers. 14 denotes the valve-casings, and 14* livesteam-admission ports.

13 denotes a stud on the end of the valve having a suitable seat or cavity in the valvecasing, and 13 is a cross-bar connecting the Valve andzitszstem.

open ends of the abutments.

The cranks 7 are each pivotally connected to a rod 15, fixed to one of two eccentricstra s 16 on eccentric 17, fixed to a istonsha t 18, having bearings 18 in the cy inderheads and provided with a pulley 19. The

brasses 20, in which crankins 21 have bear 6o ing, can be backed by sprlngs 22 to, permit variation in the operative length of the eccentric-arms 15. Other means known to be suitable for such general purpose may be employed.

Numeral 23 denotes a piston on shaft 18 and preferably made hollow with partitions or webs substantially as represented to insure lightness and strength. The abutments are similarly formed for the same and other reasons. The iston is ovoid in crosssection and eccentrlcally secured on the shaft, as indicated. The shape and dimensions of this piston and of each abutment are such and their period of rotation is so provided for that two longitudinal lines of the dicated by 25. The other half (indicated by 25) admit steam to relieve the piston and avoid compression. The abutments and piston are of the same length as the cylinder and its extensions on the interior.

24 denotes exhaust-ports in a cylinder-head to permit the exit of the exhaust through the The exhaust enters the abutments through the ports 25, situated on one side of a central web orpartition 26.

Packings of any approved form extending lengthwise the abutments and piston an connected with radially-situated packings at their ends in any usual or approved manner are denoted by. 27.

The admission-valves 13 have stems 13* extending lengthwise through the valve and I the valve-casings 14. They are provided at each end withfa'jcrank-armfl3 ,;pivotally coning. As indicated, steam has been cut off by the rapper admission-valve 13 and is about to be a mitted by the lower one. Steam is expanding above the piston, and the exhaust has escaped through the left-hand abutment.

The abutments move oppositely to the piston and the upper line of the one at the right continues in contact with the piston until its peripheryscomes into such contact. The lower valve moving as indicated by the arrow willbe insituation to admit steam through port 14" as soon as the acked line of the piston passes the port. t this moment steam-pressure acts upon the concave or entire face of the abutment equally on opposite sides of the abutment-shaft. This equilibrium would be destroyed as soon as the periphery of the upper exterior of the abutment passes within its cylinder extension or casing; but at such time and for a brief moment live steam enters the abutment through ports 25 to effect a counterbalance of pressure on the abutment-shaft and cushion the abutment. The parts bein continuously driven without change of irection, steam is next admitted through the upper valve and exhausted through the abutment immediately below it in like manner as described with reference to tne other valve and abutment.

To avoid complicating and obscuring the drawings and unnecessarily extending the description, the steam admitting and exhausting devices necessary for reversing the engine are not shown, such matter being regarded as obvious.

What I claim is 1. The combination of the cylinder having the extensions provided with exhaust-ports, the piston, the abutments provided with openings for the exhaust-steam, said piston and abutments having each the same length as the cylinder interior, the piston-shaft, an eccentric on said shaft at each end of the cylinder, abutment shafts, steam admission valves, valve-stems, connections between the eccentrics and the abutment-shafts, and connections between said shafts and the valvestems, all substantially as set forth whereby upon admission of steam the piston and abutments are driven oppositely, steam exhausted and fresh live steam admitted and exhausted continuously.

2. In a rotary en ine, the combination of the cylinder and cy inder extension, with a piston, means for admitting and exhaustin steam, an abutment having a periphera opening forexhaust and an open end and the cylinder extension having a coacting exhaustport and a distinct steam-admission port out side the abutment.

3. In a rotary en ine, the combination of the cylinder and cylinder extension, with a piston, means for admitting and exhausting steam, and an abutment having a peri )heral opening for exhaust and an open en and the cylinder extension having a coacting exhaust-port, said abutment having also ports communicating with the expanding live steam, and a distinct steam-admission port outside the abutment.

4. In a rotary engine, the combination of the cylinder and piston, with hollow rotating abutments of approximately semicylindrical form, each having a face entire to receive livesteam pressure on opposite sides of the abutment-shaft and having on its periphery opposite said face live-steam ports to cushion the abutment, and exhaust-ports to transmit steam to an exhaust-port in the cylinder.

5. In a rotary engine, a piston, hollow rotating abutments having each an approxi mately semicylindrical form, a partition dividing the abutment hollow into two parts, ports adapted to admit live steam on one side of said partition, ports to admit exhauststeam on the other side of the partition, and an exhaust-port in the cylinder to coact with the exhaust-ports of the abutment.

6. In a rotary engine, the combination of the cylinder, piston, piston-shaft, abutments, abutment-shafts, valves, valve-stems, said stems having crank-arms, and the abutment-shafts having crank-arms at'each end, an eccentric on the piston-shaft at each end of the cylinder, and connections for rotating the abutments from the eccentrics and mediately rotating the valves.

7. In a rotary engine, the combination of the cylinder, piston, piston-shaft, abutments, abutment-shafts, valves, valve-stems, said stems having crank-arms, and the abutment-shafts having crank-arms at each end, an eccentric on the piston-shaft at each end of the cylinder, and connections for rotating the abutments from the eccentrics and mediately rotating the valves, said abutmentshaft cranks being set at an angle to each other to avoid dead-centers.

8. In a rotary engine, the combination of the cylinder, piston, piston-shaft, abutments, abutment-shafts, valves, valvestems, said stems having crank-arms, and the abutment-shafts having crank-arms at each end, an eccentric on the piston-shaft at each end of the cylinder, and connections for rotating the abutments from the eccentrics and mediately rotating the valves, said connections comprising rods loosely connecting the valvestems and abutment-shaft cranks, and rods connecting the latter cranks with the eccentrics.

9. In a rotary engine, the combination of the cylinder, piston, piston-shaft, abut- IIO IIS

ments, abutment-shafts, valves and valvestems, said stems having crank-arms, and the abutment-shafts having crank-arms at each end, aneccentric on the piston-shaft at each end of the cylinder, and connections for rotating the abutments from the eccentrics and mediately rotating the valves, said con- 'nections comprising rods loosely connecting the valve-stems and abutment-shaft cranks,

and rods connecting the latter cranks With the eccentrics, said'latter rods having each its eflective length variable. I

'10. In a rotary engine, the combination of the cylinder, piston, piston-shaft, abutments, abutment-shafts, valves and valvestems, said stems having crank-arms, and the abutment-shafts having crank-arms at specification in the ARTHUR E. EAMES. I

each end, an eccentric on the piston-shaft at 

